{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01790_041.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Chicago, Illinois | 1919 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"120"},{"label":"placed","value":"86"},{"label":"unplaced","value":"34"},{"label":"fit sources","value":"georef 64, georef-snap 21, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"3 sheet(s) cut into 6 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 41.82027,-87.69921 +/-2562m); p10 (tier 1, 41.83560,-87.69327 +/-264m); p11 (tier 2, 41.81202,-87.68901 +/-100m); p113__2 (tier 2, 41.81088,-87.68267 +/-173m); p116 (tier 2, 41.81083,-87.67628 +/-160m); p12 (tier 1, 41.83699,-87.68680 +/-260m); p13 (tier 1, 41.83240,-87.72186 +/-261m); p16 (tier 1, 41.83221,-87.71523 +/-263m); p17 (tier 2, 41.82614,-87.69472 +/-100m); p18 (tier 3, 41.83192,-87.70930 +/-440m); p19 (tier 2, 41.82991,-87.70646 +/-100m); p20 (tier 1, 41.83004,-87.70400 +/-129m); p21 (tier 2, 41.83193,-87.70040 +/-213m); p22 (tier 2, 41.83012,-87.69612 +/-100m); p23 (tier 2, 41.83157,-87.69188 +/-155m); p27 (tier 1, 41.82806,-87.72251 +/-265m); p28 (tier 2, 41.82620,-87.70939 +/-1814m); p29 (tier 2, 41.82967,-87.71728 +/-100m); p30 (tier 2, 41.81806,-87.70469 +/-1137m); p31 (tier 2, 41.82800,-87.70784 +/-100m); p39 (tier 3, 41.82404,-87.72248 +/-440m); p40 (tier 1, 41.81298,-87.69073 +/-235m); p41 (tier 3, 41.82437,-87.71779 +/-440m); p42 (tier 1, 41.82472,-87.71530 +/-131m); p55 (tier 1, 41.81937,-87.72158 +/-262m); p56 (tier 1, 41.81943,-87.72145 +/-270m); p59 (tier 2, 41.81645,-87.71853 +/-207m); p61 (tier 1, 41.82079,-87.71178 +/-248m); p71 (tier 1, 41.82116,-87.68315 +/-264m); p73__1 (tier 1, 41.82125,-87.67836 +/-264m); p73__2 (tier 2, 41.82209,-87.68100 +/-100m); p74 (tier 3, 41.81829,-87.67657 +/-440m); p84 (tier 1, 41.81826,-87.68101 +/-254m); p8__2 (tier 2, 41.82507,-87.69981 +/-1056m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p1","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0001/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5852.0,8508.0 -0.0,8508.0 -0.0,-0.0 5852.0,0.0 5852.0,8508.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4508.0,4236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7218678,41.8351104]}},{"type":"Feature","properties":{"resourceCoords":[4508.0,8116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7218317,41.8333296]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0100/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0100/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5868.0,8504.0 2986.1,8504.0 2992.2,6962.8 -0.0,6950.8 -0.0,-0.0 5868.0,0.0 5868.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0100/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67830317662218,41.815852422596755]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67430075801697,41.81590839155853]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67419269173669,41.811554818376294]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6781951103419,41.81149884941452]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p101","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0101/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0101/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,165.1 973.4,174.0 972.2,431.4 2916.0,444.3 2916.0,192.0 4889.4,210.2 4922.9,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0101/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2916.0,8120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7223747,41.8078993]}},{"type":"Feature","properties":{"resourceCoords":[2916.0,192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7225095,41.8115633]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p102","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"17"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0102/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0102/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5868.0,8133.2 5868.0,8504.0 972.2,8504.0 892.1,193.2 2719.6,0.0 2717.9,199.7 2873.4,200.2 2893.6,2193.1 4812.0,2196.7 4833.5,7973.8 5082.4,8130.1 5868.0,8133.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[928.0,4156.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7212097,41.8097465]}},{"type":"Feature","properties":{"resourceCoords":[4812.0,6168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7187699,41.8088546]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p103","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0103/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0103/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,7753.3 1897.1,6349.0 2021.7,0.0 2524.9,0.0 2524.3,297.5 4548.0,336.0 4521.3,4037.4 4752.6,4513.5 4768.0,8256.0 4515.4,8252.3 4514.9,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4768.0,8256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7109888,41.8080493]}},{"type":"Feature","properties":{"resourceCoords":[4548.0,336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7112834,41.8116919]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0104/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0104/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8192.0 253.7,8195.4 231.6,4464.3 -0.0,3992.8 18.8,299.9 1842.0,332.0 1837.4,818.3 4719.7,684.5 5612.7,0.0 5877.3,0.0 5888.0,8504.0 -0.0,8504.0 -0.0,8192.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71130068907031,41.81183009499448]}},{"type":"Feature","properties":{"resourceCoords":[5888.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70767846475212,41.81191413994629]}},{"type":"Feature","properties":{"resourceCoords":[5888.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70751675105828,41.8079872287745]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71113897537647,41.80790318382269]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p105","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0105/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0105/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2580.0,520.0 5888.0,490.1 5888.0,8504.0 767.5,8474.8 713.9,831.9 2581.6,843.0 2580.0,520.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2576.0,8256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7064063,41.8081095]}},{"type":"Feature","properties":{"resourceCoords":[2580.0,520.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.706528,41.8116634]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p106","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0106/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0106/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"701.2,532.2 1534.0,398.0 5309.9,414.3 5309.9,8325.8 4864.7,8324.0 4864.4,8504.0 706.4,8504.0 701.2,532.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5312.0,4360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7015932,41.8099916]}},{"type":"Feature","properties":{"resourceCoords":[1320.0,8300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7039847,41.8081388]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p107","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0107/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0107/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5888.0,8504.0 -0.0,8504.0 -0.0,8089.8 447.5,8090.9 434.7,138.7 5888.0,153.1 5888.0,4127.0 5888.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0107/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4424.0,4120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6991562,41.8100283]}},{"type":"Feature","properties":{"resourceCoords":[2420.0,8096.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7003238,41.8081932]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0108/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p108","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0108/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0108/info.json","type":"ImageService2","height":8504,"width":5876},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"961.8,133.2 5474.9,137.0 5487.5,8059.9 5876.0,8060.8 5876.0,8504.0 977.0,8449.1 961.8,133.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0108/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1496.0,4092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6979366,41.8100458]}},{"type":"Feature","properties":{"resourceCoords":[3492.0,8056.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6966561,41.8082508]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p109","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0109/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0109/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"937.2,8074.6 918.9,130.5 4932.0,131.2 4941.9,8504.0 1327.0,8504.0 1326.7,8075.2 937.2,8074.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0109/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[928.0,4108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6954879,41.8100809]}},{"type":"Feature","properties":{"resourceCoords":[4944.0,8080.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6929746,41.8083062]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p110","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0110/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0110/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"982.0,8504.0 965.9,169.8 4940.1,167.5 4947.5,8504.0 982.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0110/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2940.0,8088.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6917712,41.8083249]}},{"type":"Feature","properties":{"resourceCoords":[4944.0,8088.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6905372,41.808344]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0111/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p111","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0111/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0111/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4713.7,8504.0 370.2,8504.0 366.0,158.7 4728.9,152.1 4713.7,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0111/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2336.0,6064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6893494,41.8092789]}},{"type":"Feature","properties":{"resourceCoords":[2336.0,8056.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6893234,41.8083628]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0112/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p112","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"12"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0112/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0112/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,152.9 5524.0,188.0 5522.7,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0112/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5524.0,6052.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6844673,41.8093541]}},{"type":"Feature","properties":{"resourceCoords":[5524.0,188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6845373,41.812054]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0113__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p113 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5888.0"},{"label":"split_canvas_h","value":"8504.0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0113__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0113/info.json","type":"ImageService2","height":8504,"width":5888},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5888.0,8504.0 5888.0,7966.0 5888.0,6729.6 4800.0,6707.6 4807.2,6054.0 4808.8,5869.6 4809.2,5856.8 4906.0,5850.4 5888.0,5800.4 5888.0,5696.0 5888.0,5556.0 5888.0,4616.0 5888.0,791.0 3701.8,799.1 3699.8,267.7 634.1,347.6 637.4,8504.0 5888.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0113__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[636.0,4268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6844906,41.8102511]}},{"type":"Feature","properties":{"resourceCoords":[636.0,8244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6844444,41.8084226]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0114/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p114","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0114/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0114/info.json","type":"ImageService2","height":8504,"width":5876},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2638.1,874.9 5100.0,850.5 5117.0,8504.0 2688.1,8504.0 2638.1,874.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0114/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68293016557594,41.81228692092997]}},{"type":"Feature","properties":{"resourceCoords":[5876.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67929283880743,41.81232077659643]}},{"type":"Feature","properties":{"resourceCoords":[5876.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6792275619303,41.80836950169724]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68286488869882,41.808335646030784]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0115/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p115","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0115/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0115/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,772.5 1220.3,763.1 1214.1,0.0 5868.0,0.0 5868.0,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0115/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67977362469956,41.81227686278624]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67617377465734,41.81231640369212]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67609743207123,41.808400513998905]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67969728211345,41.80836097309302]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p14","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0014/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0014/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4097.9,515.9 4059.2,8508.0 -0.0,8508.0 -0.0,424.7 4097.9,515.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5028.0,8172.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.719225,41.829743]}},{"type":"Feature","properties":{"resourceCoords":[5028.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7193815,41.8333632]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p15","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0015/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0015/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4857.9,463.4 5852.0,470.9 5852.0,8508.0 -0.0,8508.0 -0.0,118.0 4860.7,122.8 4857.9,463.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4828.0,4136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.716881,41.8315605]}},{"type":"Feature","properties":{"resourceCoords":[2868.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7181637,41.8334005]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0002/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5852.0,0.0 5852.0,8049.9 2075.1,8096.1 2079.2,8508.0 366.8,8483.6 385.3,131.2 -0.0,130.2 -0.0,-0.0 5852.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72132081847512,41.837122096189894]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71767466479248,41.837169769418836]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7175822910051,41.83319229756481]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72122844468774,41.833144624335866]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p24","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0024/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0024/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5462.6,8214.6 -0.0,8204.5 0.0,0.0 5455.1,0.0 5462.6,8214.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69187757513158,41.83393322383794]}},{"type":"Feature","properties":{"resourceCoords":[5880.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68824941027201,41.83400443009042]}},{"type":"Feature","properties":{"resourceCoords":[5880.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68811109504404,41.83009757775785]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69173925990361,41.83002637150537]}},{"type":"Feature","properties":{"resourceCoords":[2920.0,8208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6899423,41.8301968]}},{"type":"Feature","properties":{"resourceCoords":[2920.0,8208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.689916,41.8292705]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p25","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0025/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0025/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5880.0,8259.4 -0.0,8242.6 0.0,-0.0 5880.0,0.0 5880.0,8259.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5312.0,-196.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6852149,41.8342006]}},{"type":"Feature","properties":{"resourceCoords":[3356.0,8248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6862874,41.8302654]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p26","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0026/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0026/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5029.2,7607.6 2007.7,7597.7 2015.7,267.4 5880.0,262.8 5880.0,8504.0 5030.9,8504.0 5030.0,8052.8 5029.2,7607.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2984.0,4264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6862345,41.8284274]}},{"type":"Feature","properties":{"resourceCoords":[2984.0,264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6862874,41.8302654]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0003/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"339.4,0.0 5342.7,0.0 5343.2,257.7 5852.0,255.5 5852.0,8508.0 1391.8,8508.0 1392.0,8164.0 318.8,8157.7 339.4,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5352.0,4256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.714547,41.8352354]}},{"type":"Feature","properties":{"resourceCoords":[1392.0,8164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7169288,41.8334133]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p32","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0032/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0032/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5880.0,337.9 5334.7,336.9 5320.1,8504.0 -0.0,8504.0 -0.0,-0.0 5880.0,0.0 5880.0,337.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5652.0,4484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.704569,41.82809]}},{"type":"Feature","properties":{"resourceCoords":[5652.0,6484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7045365,41.8271688]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p33","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"8"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0033/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0033/info.json","type":"ImageService2","height":8504,"width":5884},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5884.0,0.0 5884.0,4183.4 5022.7,4184.0 5021.1,8504.0 -0.0,8504.0 -0.0,-0.0 5884.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4328.0,6216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.702094,41.8272134]}},{"type":"Feature","properties":{"resourceCoords":[332.0,6216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7045365,41.8271688]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p34","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0034/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0034/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5880.0,7997.0 -0.0,8017.5 -0.0,4259.1 841.8,4258.1 840.2,169.4 -0.0,169.7 -0.0,-0.0 5113.0,0.0 5136.4,273.4 5284.0,380.0 5216.0,4252.9 5880.0,4252.0 5880.0,7997.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3264.0,6240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6996286,41.8272602]}},{"type":"Feature","properties":{"resourceCoords":[5284.0,380.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6984537,41.8300138]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p35","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0035/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0035/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5880.0,8039.7 1231.6,8045.9 1213.0,4275.9 544.6,4280.0 593.8,381.0 444.7,274.4 419.9,0.0 5880.0,0.0 5880.0,299.1 5081.5,311.8 5080.3,4259.2 5880.0,4256.5 5880.0,8039.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2496.0,4268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6972255,41.8282311]}},{"type":"Feature","properties":{"resourceCoords":[2496.0,6264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6972017,41.827307]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p36","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"17"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0036/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0036/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"802.5,8056.7 801.3,4266.1 -0.0,4269.0 -0.0,314.0 800.0,301.1 799.9,1.4 5880.0,0.0 5880.0,266.7 5303.1,269.8 5383.2,8504.0 1322.8,8504.0 1325.3,8052.4 802.5,8056.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1368.0,4264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6947717,41.8282724]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6948182,41.8301078]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p37","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"18"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0037/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0037/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"906.9,264.6 4856.0,280.0 4796.4,8504.0 909.3,8504.0 906.9,264.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[868.0,6252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6922974,41.8274002]}},{"type":"Feature","properties":{"resourceCoords":[4856.0,280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6899423,41.8301968]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p38","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0038/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0038/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5880.0,7530.0 3927.9,7525.8 3925.5,8504.0 973.7,8504.0 967.3,292.4 5880.0,268.4 5880.0,7530.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[972.0,6212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6898644,41.827451]}},{"type":"Feature","properties":{"resourceCoords":[2940.0,284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6887144,41.8302193]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p4","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0004/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0004/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"150.0,304.0 151.1,47.7 -0.0,-0.0 5852.0,0.0 5852.0,302.9 150.0,304.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71469846361633,41.83720081571815]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71108736168068,41.837265354007535]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7109613396262,41.83335643231585]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71457244156184,41.833291894026466]}},{"type":"Feature","properties":{"resourceCoords":[148.0,304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7146014,41.8370628]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0043/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0043/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0,8504 0,0 5900,0 5900,8504 0,8504\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7148455624766,41.826235021259414]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71127702025463,41.826303861552184]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71114480191542,41.82244388798824]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7147133441374,41.82237504769547]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p44","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"8"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0044/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0044/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4979.9,6417.4 4067.1,6416.2 4066.5,6532.6 5900.0,6542.9 5900.0,6699.4 2100.0,6841.7 2162.2,8504.0 -0.0,8504.0 -0.0,-0.0 4104.4,0.0 4090.3,2417.9 4972.0,2417.5 4979.9,6417.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[956.0,4416.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7117721,41.8234018]}},{"type":"Feature","properties":{"resourceCoords":[4976.0,4416.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7093305,41.8234376]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0045/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0045/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4041.5,8371.4 4043.5,8504.0 -0.0,8504.0 -0.0,8388.9 908.4,8385.1 877.4,4432.4 -0.0,4437.7 -0.0,-0.0 3154.1,0.0 3160.0,473.8 3920.5,464.6 3950.8,2442.6 4896.2,2436.8 4934.9,8367.5 4041.5,8371.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70993013282474,41.82636674622595]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70632897363055,41.82640449852327]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70625646421492,41.822509262484104]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7098576234091,41.82247151018679]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p46","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0046/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0046/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4857.3,8401.6 -0.0,8504.0 -0.0,8350.2 892.1,8359.7 944.0,2396.0 -0.0,2387.7 -0.0,398.4 4621.8,411.2 4620.7,655.8 4956.9,657.3 4857.3,8401.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[944.0,2396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7069209,41.8252819]}},{"type":"Feature","properties":{"resourceCoords":[4916.0,6404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7044226,41.8235094]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p47","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"14"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0047/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0047/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4877.7,7803.3 868.7,7798.9 917.9,415.7 5900.0,431.0 5900.0,2168.5 4944.6,2173.0 4877.7,7803.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4940.0,6184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7019776,41.8235585]}},{"type":"Feature","properties":{"resourceCoords":[924.0,2192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7044713,41.8253231]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p48","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"12"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0048/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0048/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"985.6,2220.0 1931.8,2217.1 1934.7,496.4 1671.8,473.1 1672.0,0.0 4551.5,0.0 4560.7,8184.0 904.6,8188.5 985.6,2220.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[980.0,4200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7020041,41.8244687]}},{"type":"Feature","properties":{"resourceCoords":[4964.0,2208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6995918,41.8254234]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p49","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0049/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0049/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8212.0 -0.0,-0.0 5900.0,0.0 5900.0,4206.1 4412.0,4208.0 4346.6,8098.8 325.1,8090.6 323.3,8211.9 -0.0,8212.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[404.0,6208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6995333,41.8236076]}},{"type":"Feature","properties":{"resourceCoords":[4412.0,4208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6971117,41.8245667]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p5","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0005/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"896.3,0.0 5852.0,0.0 5852.0,261.9 5478.0,262.7 5493.7,8490.0 -0.0,8508.0 -0.0,274.8 896.9,272.9 896.3,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71164003125276,41.83724250428128]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70802876249762,41.837301642135586]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7079132857168,41.833392539866246]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71152455447194,41.83333340201194]}},{"type":"Feature","properties":{"resourceCoords":[3140.0,268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7096987,41.8371511]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p50","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0050/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0050/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4980.4,459.0 4844.1,8196.0 818.3,8190.7 891.4,4183.1 2381.0,4183.4 2387.0,0.0 4861.6,0.0 4855.3,458.0 4980.4,459.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[888.0,6180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6970807,41.8236569]}},{"type":"Feature","properties":{"resourceCoords":[4884.0,4184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6946708,41.8246156]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p51","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0051/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0051/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"871.1,8206.2 980.9,474.3 4914.4,493.2 4900.7,8197.7 871.1,8206.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4908.0,4184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.692217,41.8246648]}},{"type":"Feature","properties":{"resourceCoords":[884.0,6192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.69465,41.8237058]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0052/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0052/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4930.6,8151.2 4931.5,8504.0 2115.6,8504.0 2118.5,8171.6 967.9,8179.7 942.1,541.4 4910.6,466.0 4929.8,7873.4 4580.6,8154.5 4930.6,8151.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69285014793877,41.826588611318904]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68923404656077,41.82663927630424]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68913673628437,41.82272787575518]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69275283766237,41.82267721076984]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0053/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0053/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"859.4,837.4 3844.6,836.3 3831.1,8404.0 522.0,8430.5 870.0,8151.0 859.4,837.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69037351141866,41.82676683760925]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68674178759385,41.826820832979244]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68663808041183,41.822892548032655]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69026980423664,41.82283855266266]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0054/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0054/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8389.5 0.0,-0.0 4907.4,0.0 4912.1,875.0 5746.9,872.3 5743.7,0.0 5900.0,0.0 5874.7,8336.7 -0.0,8389.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68800771803288,41.82686950529145]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68430638287573,41.82691961113647]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68421014609837,41.82291603389965]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68791148125551,41.82286592805463]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0057/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0057/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"838.7,8169.9 -0.0,8172.4 -0.0,-0.0 5900.0,0.0 5900.0,8504.0 5803.7,8504.0 5799.0,7831.5 838.1,7865.2 838.7,8169.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72445893083805,41.81900148633833]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72079816937818,41.81903956530478]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.720725041062,41.81507939841145]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72438580252187,41.815041319445]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0058/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0058/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0,8504 0,0 5900,0 5900,8504 0,8504\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72268904544195,41.81875366120469]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71927555063196,41.81874811723099]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71928619753413,41.815055454660225]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72269969234412,41.815060998633925]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p6","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0006/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0006/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5564.9,0.0 5546.5,8508.0 -0.0,8508.0 -0.0,280.7 374.0,280.6 374.5,18.7 5564.9,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70826012358351,41.83730614123056]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7046490128632,41.83737040646153]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.704523524002,41.83346147526069]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70813463472231,41.83339721002972]}},{"type":"Feature","properties":{"resourceCoords":[5564.0,280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7048226,41.8372386]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0060/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0060/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4969.2,8236.8 4638.2,8504.0 1617.9,8504.0 1616.6,8354.5 1222.3,8356.3 1096.7,8279.6 1059.9,5402.2 97.2,5408.8 78.1,4416.3 -0.0,4416.7 -0.0,-0.0 5900.0,0.0 5900.0,7410.5 4967.0,8124.7 4969.2,8236.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72022197338569,41.81569903920515]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71291847198943,41.81576977386319]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7127826419229,41.80786826664358]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72008614331916,41.80779753198554]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p62","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0062/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0062/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5850.6,0.0 5751.4,298.3 5503.6,8475.3 -0.0,8234.9 -0.0,-0.0 5850.6,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7110483,41.8223141]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7043682,41.8225987]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7038178,41.8154232]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7104979,41.8151386]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p63","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"16"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0063/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0063/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"903.4,8299.0 854.5,973.7 1022.8,0.0 4998.2,0.0 4877.2,632.1 4924.0,8286.7 903.4,8299.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[880.0,4360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7044564,41.8207949]}},{"type":"Feature","properties":{"resourceCoords":[4900.0,4360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.701995,41.8208348]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p64","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"16"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0064/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0064/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4989.0,407.0 4917.2,8247.1 931.4,8242.3 917.0,643.0 1033.9,406.3 4989.0,407.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[924.0,4344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.701995,41.8208348]}},{"type":"Feature","properties":{"resourceCoords":[4920.0,4344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6995307,41.8208825]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p65","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0065/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0065/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"861.2,8504.0 913.0,0.0 4934.0,0.0 4889.0,7540.6 2776.4,7568.0 2781.5,8504.0 861.2,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2768.0,6020.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6983294,41.8200218]}},{"type":"Feature","properties":{"resourceCoords":[848.0,2108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6995613,41.8217857]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0066/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0066/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"925.8,8504.0 1076.2,80.0 4960.1,120.9 4852.0,5876.3 1385.3,8504.0 925.8,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69777355329835,41.82275956898325]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6940360449941,41.8228609165882]}},{"type":"Feature","properties":{"resourceCoords":[5900.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69384140224038,41.81881795238826]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69757891054462,41.81871660478331]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p67","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0067/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0067/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5358.4,8504.0 711.9,8504.0 701.8,7739.8 -0.0,7747.5 -0.0,6817.0 682.4,6267.1 637.6,169.3 5900.0,85.5 5900.0,2071.1 2593.0,4729.9 5358.4,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4160.0,3468.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6924855,41.8213213]}},{"type":"Feature","properties":{"resourceCoords":[652.0,2144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6946083,41.8219006]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p68","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0068/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0068/info.json","type":"ImageService2","height":8504,"width":5900},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2588.0,2065.2 2603.6,454.6 5408.1,456.7 5420.8,8504.0 1997.1,8357.7 -0.0,5576.7 -0.0,4105.1 2588.0,2065.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3580.0,3868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6908143,41.8211387]}},{"type":"Feature","properties":{"resourceCoords":[3580.0,7212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6907741,41.8196048]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0069/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0069/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"867.2,8504.0 886.3,114.2 4853.9,97.3 4816.2,7909.0 2843.2,7902.0 2841.2,8504.0 867.2,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69028349010081,41.82292502617643]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6866625743065,41.822988994969556]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68653904900141,41.819050802477285]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69015996479573,41.81898683368416]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p7","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0007/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"332.6,0.0 4990.0,0.0 3345.8,7544.3 5852.0,8090.5 5852.0,8508.0 -0.0,8508.0 314.5,8396.0 332.6,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70502994612728,41.83731214028694]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70141883540697,41.83737640551791]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70129334654577,41.83346747431707]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70490445726608,41.8334032090861]}},{"type":"Feature","properties":{"resourceCoords":[332.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7048226,41.8372386]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0070/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0070/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5868.0,96.6 5868.0,8504.0 952.8,8504.0 989.6,116.0 5868.0,96.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6879034660017,41.822976329787075]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68425720114595,41.82303950479003]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68413520853196,41.8190737465258]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6877814733877,41.819010571522846]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0072/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0072/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"196.3,2986.4 252.7,0.0 5868.0,0.0 5868.0,7443.2 363.1,7467.6 273.4,3253.7 196.3,2986.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68439496449619,41.82312145530126]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.680623245177,41.82313201468666]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68060285468056,41.819029817803745]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68437457399975,41.81901925841835]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p75","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"19"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0075/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0075/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5801.2,6789.9 4351.7,7926.0 819.9,7865.6 792.0,0.0 4797.9,89.0 4817.4,5973.3 5200.2,5977.2 5801.2,6789.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4816.0,4012.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7018606,41.8172413]}},{"type":"Feature","properties":{"resourceCoords":[816.0,5968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7042981,41.8163]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p76","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0076/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0076/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4988.0,7951.3 515.6,7927.4 1966.7,6795.4 1368.0,5981.9 985.4,5977.2 979.2,96.9 4964.5,99.8 4988.0,7951.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[984.0,2064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7018941,41.8181391]}},{"type":"Feature","properties":{"resourceCoords":[4964.0,2064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6994393,41.8181858]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p77","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0077/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0077/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"941.5,895.9 2829.7,920.4 2836.5,0.0 4914.2,0.0 4893.7,1332.8 5359.8,1332.9 4254.2,2176.0 4892.7,3011.0 4826.7,8264.4 881.5,8199.7 941.5,895.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0077/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[900.0,4320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6994086,41.8172794]}},{"type":"Feature","properties":{"resourceCoords":[4888.0,4360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6969261,41.8173285]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p78","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0078/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0078/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4956.6,8331.2 990.6,8328.4 974.3,3032.2 317.6,2200.7 3111.5,0.0 4938.5,0.0 4956.6,8331.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2944.0,4392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6957199,41.8173473]}},{"type":"Feature","properties":{"resourceCoords":[4948.0,4392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6944823,41.8173666]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p79","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0079/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0079/info.json","type":"ImageService2","height":8504,"width":5880},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4437.4,8379.9 447.9,8380.0 425.1,731.2 3004.2,757.6 3004.0,4407.9 4431.9,4408.0 4437.4,8379.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2440.0,4408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6932549,41.817385]}},{"type":"Feature","properties":{"resourceCoords":[436.0,4408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6944823,41.8173666]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p80","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0080/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0080/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1429.7,8369.0 1424.0,4408.0 -0.0,4408.0 -0.0,767.7 5868.0,1006.2 5868.0,8368.5 1429.7,8369.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5420.0,4408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6895807,41.81744]}},{"type":"Feature","properties":{"resourceCoords":[1424.0,4408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6920349,41.8174033]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p81","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0081/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0081/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2889.5,8504.0 2889.6,7984.1 1356.1,7984.2 1356.7,615.1 2889.9,609.7 2890.0,0.0 4874.3,0.0 4861.8,7983.8 3389.6,7984.0 3389.7,8504.0 2889.5,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[908.0,4020.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6895807,41.81744]}},{"type":"Feature","properties":{"resourceCoords":[4868.0,4020.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6871509,41.8174765]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p82","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0082/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0082/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5805.7,7899.3 930.1,7890.4 941.0,700.3 5816.7,685.0 5805.7,7899.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0082/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[936.0,4008.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6871509,41.8174765]}},{"type":"Feature","properties":{"resourceCoords":[4880.0,4008.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6846802,41.8175135]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p83","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0083/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0083/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5868.0,8260.2 142.6,8271.8 59.9,0.0 5868.0,0.0 5868.0,8260.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0083/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68418047293316,41.8195196081154]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68057480159875,41.819541742131854]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68053206250681,41.8156199247444]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68413773384123,41.81559779072794]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p85","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0085/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0085/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"970.2,8245.7 -0.0,8243.3 -0.0,304.6 886.1,308.0 887.6,0.0 5868.0,0.0 5868.0,8258.5 2919.6,8250.8 2921.3,8504.0 970.7,8504.0 970.2,8245.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4900.0,4304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7213364,41.8134002]}},{"type":"Feature","properties":{"resourceCoords":[4900.0,8256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7212856,41.8115799]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p86","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0086/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0086/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0,8504 0,0 5868,0 5868,8504 0,8504\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[900.0,4320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7213364,41.8134002]}},{"type":"Feature","properties":{"resourceCoords":[900.0,8288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7212856,41.8115799]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p87","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0087/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0087/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2460.0,8030.6 2459.3,7735.4 1960.0,7737.6 2078.0,0.0 5868.0,0.0 5868.0,8080.6 2460.0,8030.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0087/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4468.0,8060.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7112834,41.8116919]}},{"type":"Feature","properties":{"resourceCoords":[4468.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7114213,41.8153539]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p88","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0088/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0088/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4736.9,7662.4 4720.8,7942.9 4460.3,7856.0 3534.2,8504.0 643.8,8504.0 671.5,8014.1 265.0,7987.9 662.9,0.0 5868.0,307.1 5868.0,6870.9 4736.9,7662.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0088/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2908.0,128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7091679,41.8153833]}},{"type":"Feature","properties":{"resourceCoords":[2908.0,8940.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7087469,41.8113596]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p89","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0089/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0089/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1851.5,8504.0 -0.0,8504.0 -0.0,7402.2 1070.1,6557.9 697.9,87.5 5643.6,142.1 5732.5,8126.0 1848.0,8184.0 1851.5,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0089/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1848.0,8184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.706528,41.8116634]}},{"type":"Feature","properties":{"resourceCoords":[3676.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7054932,41.8154311]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0008__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p8 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5852.0"},{"label":"split_canvas_h","value":"8508.0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0008__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0008/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 0.0,7990.0 -0.0,8508.0 3191.2,8508.0 3689.6,8508.0 5852.0,7512.8 5852.0,7340.8 5852.0,2664.0 5852.0,1488.0 5852.0,0.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70185872661825,41.83772190589911]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69831205503354,41.83721217898178]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69930738406936,41.83337300142938]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70285405565407,41.83388272834671]}},{"type":"Feature","properties":{"resourceCoords":[3180.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6999614,41.8373294]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p9","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0009/info.json","type":"ImageService2","height":8508,"width":5852},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1837.2 286.3,506.8 -0.0,445.1 -0.0,-0.0 5852.0,0.0 5852.0,8508.0 -0.0,8508.0 -0.0,1837.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69849541480322,41.83744222206747]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69488409215352,41.83749950643185]}},{"type":"Feature","properties":{"resourceCoords":[5852.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69477223462897,41.83359034582308]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69838355727867,41.83353306145871]}},{"type":"Feature","properties":{"resourceCoords":[5632.0,164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6950177,41.837422]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p90","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0090/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0090/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4924.4,8037.8 974.9,8118.7 878.4,135.7 4875.5,181.7 4924.4,8037.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[924.0,4104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7041922,41.8135884]}},{"type":"Feature","properties":{"resourceCoords":[4900.0,4104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7017182,41.8136242]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0091/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0091/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"346.1,8221.2 362.3,346.3 5868.0,389.6 5868.0,8257.8 346.1,8221.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0091/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70201002576422,41.81559850993057]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6983936568425,41.81567415593789]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69824759899147,41.81174046599906]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7018639679132,41.811664819991734]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p92","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0092/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0092/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1152.7,8286.6 1092.8,358.1 5516.3,357.9 5545.5,8280.9 1152.7,8286.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3556.0,4320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6968205,41.8136977]}},{"type":"Feature","properties":{"resourceCoords":[1552.0,4320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.698055,41.8136792]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p93","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0093/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0093/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"892.0,8216.0 901.0,300.2 4895.7,318.8 4880.5,8230.3 892.0,8216.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2900.0,4268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6943686,41.8137346]}},{"type":"Feature","properties":{"resourceCoords":[892.0,8216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6955459,41.8118975]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p94","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0094/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0094/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4870.3,8198.2 903.3,8202.9 880.8,287.3 4853.0,287.2 4870.3,8198.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[892.0,4248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6931428,41.813753]}},{"type":"Feature","properties":{"resourceCoords":[4876.0,4248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6906876,41.8137899]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p95","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0095/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0095/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"408.1,8316.0 390.7,377.1 4356.2,377.1 4356.2,555.6 4356.2,896.5 4855.9,896.5 4856.3,8304.6 408.1,8316.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0095/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2384.0,4352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6894777,41.813808]}},{"type":"Feature","properties":{"resourceCoords":[4356.0,4352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6882667,41.8138262]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p96","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0096/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0096/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5868.0,8314.3 -0.0,8259.4 -0.0,398.1 5868.0,402.5 5868.0,8314.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0096/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3412.0,4340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6858466,41.8138626]}},{"type":"Feature","properties":{"resourceCoords":[1452.0,4340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6870604,41.8138443]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0097/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0097/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4543.3,8064.5 926.4,8123.1 1000.3,137.2 4611.7,208.3 4543.3,8064.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68498667525374,41.815752077745636]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68141269884617,41.81583155804488]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68125923661073,41.81194400840638]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6848332130183,41.81186452810714]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p98","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0098/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0098/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7972.1 928.0,7972.0 942.0,153.7 5868.0,211.6 5868.0,8504.0 -0.0,8504.0 -0.0,7972.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68275751050592,41.81578017940652]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67913641152747,41.81584092953872]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67901816556642,41.811933711919934]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68263926454487,41.81187296178773]}},{"type":"Feature","properties":{"resourceCoords":[928.0,7972.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.682074,41.812127]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1919 | sanborn01790_041 p99","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:30:11Z","modified":"2026-09-21T06:30:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0099/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0099/info.json","type":"ImageService2","height":8504,"width":5868},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0,8504 0,0 5868,0 5868,8504 0,8504\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g01790191922:01790_22_1919-0099/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68037352949992,41.81578849191882]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6767736293417,41.815864298805565]}},{"type":"Feature","properties":{"resourceCoords":[5868.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.67662725908937,41.81194857015787]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6802271592476,41.811872763271126]}}]}}]}